SLIP-ON FLANGES

Slip-on flanges are also called SO flanges. It’s a kind of flange that slides over the pipe with an internal design is slightly larger than the pipe. Since the inner diameter of the flange is slightly larger than the outer diameter of the pipe, the SO flange can be directly connected to equipment or pipe by fillet weld at the top and bottom of the flange. It is used to insert the pipe into the inner hole of the flange.

Our Supply Range:

Standard: ASTM A105, ASTM A182
Material: Carbon Steel, Alloy Steel, Stainless Steel
Size: 1/2” to 24”, customized up to 60”
Pressure Ratings: Class 150 to Class 2500
Face Type: RF, RTJ

Types of Slip On Flange Welding:

The SO flange can be divided into SO welding plate flange and SO welding hubbed steel pipe flange. Its mechanical characteristics are between the integral flange and the looping flange. The structure is simple, and the processing is convenient. So slip-on flange welding is widely used in various fluid pipelines.

Depending on different faces, there are also ranges of raised face types and ring-type joint face types.

Raised Face Slip On Flange:

There is a small portion extruded from the bottom face of the slip-on flange, this type is raised face slip-on flange. The function of this area is to place a gasket seat during installation to get a better sealing performance.

As the pressure ratings are bigger, the height of this raised face will be bigger.

RTJ Slip-on Flange:

A small groove is machined on the raised face part, this form is called RTJ type, the function of this groove is to place the gasket ring, also applied for sealing, compared to RF type, RTJ is designed for high-pressure use. Slip-on flange use slip welding to connect equipment, so either below of name is describing the same flange:

• Slip-on weld flange
• Slip-on flange weld
• Weld slip-on flange
• Slip-on flange welding
• SO flange

Referred Standard and Grades:

ASTM A105 for carbon steel slip-on pipe flanges.
ASTM A182 for alloy and stainless slip-on flanges. (Alloy for F11, F22, stainless for F304/F304L, F316/F316L)
ASME B16.5 for pipe flanges and flanged fittings.
BS 3293
DIN 86029

Dimensions and Pressure Ratings:

Common outer diameters: 1/2”, 2”, 3”, 4”, 6”, 8”, 10”, 12”, to 24”.
Special made outer diameters: Up to 60”.
Class range: Class 150, Class 300, 400, 600, 900, 1500, 2500(# or LB). PN 2.5 to PN 250.
Flange face type: RF (Raised Face), RTJ (Ring Type Joint)

Manufacturing Types:

Slip-on flanges can be made by forging, steel cutting, casting and etc. Among these manufacturing types, the forging type gains the best quality and also the most common use, price is higher than other types. So before purchasing the slip-on flange, you have to know what is the specific working environment.

Advantages of Slip-On Flange:

• Lower installation costs
• Easier to align with other parts during installation
• Better leaking proof
• ​Inner and outer welding on the flange
• Takes less time to cut accurately for the pipelines
• As the pipe slides on the flange, it is compatible with the lower hub on the slip-on flange

 

Nominal	Outside	Thick of	Diameter of	Diameter of	Length	Dia of	No of	Dia of	Dia of	Diam of	Approx
Pipe Size	diameter of	flange	Hub at base	raised face	thru Hub	bore	holes	holes	bolts	bolt circle	weight
	flange	(B)	(A)	(G)	(H)	(ID)		(L)		(K)	kg
	(D)
1/2.	88.9	11.2	35.1	30.2	15.7	22.4	4	15.7	1/2.	60.5	0.5
3/4.	98.6	12.7	42.9	38.1	15.7	27.7	4	15.7	1/2.	69.9	1
1	108	14.2	50.8	49.3	17.5	34.5	4	15.7	1/2.	79.2	1
1-1/4.	117.3	15.7	63.5	58.7	20.6	43.2	4	15.7	1/2.	88.9	1
1-1/2.	127	17.5	73.2	65	22.4	49.5	4	15.7	1/2.	98.6	1
2	152.4	19.1	91.9	77.7	25.4	62	4	19.1	5/8.	120.7	2
2-1/2.	177.8	22.4	104.6	90.4	28.4	74.7	4	19.1	5/8.	139.7	3
3	190.5	23.9	127	108	30.2	90.7	4	19.1	5/8.	152.4	4
3-1/2.	215.9	23.9	139.7	122.2	31.8	103.4	8	19.1	5/8.	177.8	5
4	228.6	23.9	157.2	134.9	33.3	116.1	8	19.1	5/8.	190.5	6
5	254	23.9	185.7	163.6	36.6	143.8	8	22.4	3/4.	215.9	7
6	279.4	25.4	215.9	192	39.6	170.7	8	22.4	3/4.	241.3	9
8	342.9	28.4	269.7	246.1	44.5	221.5	8	22.4	3/4.	298.5	14
10	406.4	30.2	323.9	304.8	49.3	276.4	12	25.4	7/8.	362	20
12	482.6	31.8	381	365.3	55.6	327.2	12	25.4	7/8.	431.8	29
14	533.4	35.1	412.8	400.1	57.2	359.2	12	28.4	1	476.3	41
16	596.9	36.6	469.9	457.2	63.5	410.5	16	28.4	1	539.8	44
18	635	39.6	533.4	505	68.3	461.8	16	31.8	1-1/8.	577.9	59
20	698.5	42.9	584.2	558.8	73.2	513.1	20	31.8	1-1/8.	635	75
24	812.8	47.8	692.2	663.4	82.6	616	20	35.1	1-1/4.	749.3	100

 

Dimensions of Class 300 Slip-On Flanges

 

Nominal	Outside	Thick of	Diameter of	Diameter of	Length	Dia of	No of	Dia of	Dia of	Diam of	Approx
Pipe Size	diameter of	flange	Hub at base	raised face	thru Hub	bore	holes	holes	bolts	bolt circle	weight
	flange	(B)	(A)	(G)	(H)	(ID)		(L)		(K)	kg
	(D)
1/2.	95.3	14.2	35.1	38.1	22.4	22.4	4	15.7	1/2.	66.5	1
3/4.	117.3	15.7	42.9	47.8	25.4	27.7	4	19.1	5/8.	82.6	1
1	124	17.5	50.8	53.8	26.9	34.5	4	19.1	5/8.	88.9	1
1-1/4.	133.4	19.1	63.5	63.5	26.9	43.2	4	19.1	5/8.	98.6	2
1-1/2.	155.4	20.6	73.2	69.9	30.2	49.5	4	22.4	3/4.	114.3	3
2	165.1	22.4	91.9	84.1	33.3	62	8	19.1	5/8.	127	3
2-1/2.	190.5	25.4	104.6	100.1	38.1	74.7	8	22.4	3/4.	149.4	5
3	209.6	28.4	127	117.3	42.9	90.7	22.4	8	3/4.	168.1	6
3-1/2.	228.6	30.2	139.7	133.4	44.5	103.4	22.4	8	3/4.	184.2	8
4	254	31.8	157.2	146.1	47.8	116.1	8	22.4	3/4.	200.2	10
5	279.4	35.1	185.7	177.8	50.8	143.8	8	22.4	3/4.	235	13
6	317.5	36.6	215.9	206.2	52.3	170.7	12	22.4	3/4.	269.7	18
8	381	41.1	269.7	260.4	62	221.5	12	25.4	73/93	330.2	26
10	444.5	47.8	323.9	320.5	66.5	276.4	16	28.4	1	387.4	37
12	520.7	50.8	381	374.7	73.2	327.2	16	31.8	1-1/8.	450.9	52
14	584.2	53.8	412.8	425.5	76.2	359.2	20	31.8	1-1/8.	514.4	75
16	647.7	57.2	469.9	482.6	82.6	410.5	20	35.1	1-1/4.	571.5	86
18	711.2	60.5	533.4	533.4	88.9	461.8	24	35.1	1-1/4.	628.7	113
20	774.7	63.5	584.2	587.2	95.3	513.1	24	35.1	1-1/4.	685.8	143
24	914.4	69.9	692.2	701.5	106.4	616	24	41.1	1-1/2.	812.8	215

 

Dimensions of Class 600 Slip-On Flanges

 

Nominal	Outside	Thick of	Diameter of	Diameter of	Length	Dia of	No of	Dia of	Dia of	Diam of	Approx
Pipe Size	diameter of	flange	Hub at base	raised face	thru Hub	bore	holes	holes	bolts	bolt circle	weight
	flange	(B)	(A)	(G)	(H)	(ID)		(L)		(K)	kg
	(D)
1/2.	95.3	14.2	35.1	38.1	22.4	22.4	4	15.7	1/2.	66.5	1
3/4.	117.3	15.7	42.9	47.8	25.4	27.7	4	19.1	5/8.	82.6	1
1	124	17.5	50.8	53.8	26.9	34.5	4	19.1	5/8.	88.9	2
1-1/4.	133.4	20.6	63.5	63.5	28.4	43.2	4	19.1	5/8.	98.6	2
1-1/2.	155.4	22.4	73.2	69.9	31.8	49.5	4	22.4	3/4.	114.3	3
2	165.1	25.4	91.9	84.1	36.6	62	8	19.1	5/8.	127	4
2-1/2.	190.5	28.4	104.6	100.1	41.1	74.7	8	22.4	3/4.	149.4	6
3	209.6	31.8	127	117.3	46	90.7	8	22.4	3/4.	168.1	7
3-1/2.	228.6	35.1	139.7	133.4	49.3	103.4	8	25.4	7/8.	184.2	10
4	273.1	38.1	157.2	152.4	53.8	116.1	8	25.4	7/8.	215.9	17
5	330.2	44.5	185.7	189	60.5	143.8	8	28.4	1	266.7	29
8	419.1	55.6	269.7	273.1	76.2	221.5	12	31.8	1-1/8.	349.3	52
10	508	63.5	323.9	342.9	85.9	276.4	16	35.1	1-1/4.	431.8	77
12	558.8	66.5	381	400.1	91.9	327.2	20	35.1	1-1/4.	489	91
14	603.3	69.9	412.8	431.8	93.7	359.2	20	38.1	1-3/8.	527.1	104
16	685.8	76.2	469.9	495.3	106.4	410.5	20	41.1	1-1/2.	603.3	150
18	743	82.6	533.4	546.1	117.3	461.8	20	44.5	1-5/8.	654.1	181
20	812.8	88.9	584.2	609.6	127	513.1	24	44.5	1-5/8.	723.9	231
24	939.8	101.6	692.2	717.6	139.7	616	24	50.8	1-7/8.	838.2	331

 

Dimensions of Class 900 Slip-On Flanges
Nominal	Outside	Thick of	Diameter of	Diameter of	Length	Dia of	No of	Dia of	Dia of	Diam of	Approx
Pipe Size	diameter of	flange	Hub at base	raised face	thru Hub	bore	holes	holes	bolts	bolt circle	weight
	flange	(B)	(A)	(G)	(H)	(ID)		(L)		(K)	kg
	(D)
1/2.	120.7	22.4	35.1	38.1	31.8	22.4	4	22.4	3/4.	82.6	2
3/4.	130	25.4	42.9	44.5	35.1	27.7	4	22.4	3/4.	88.9	2
1	149.4	28.4	50.8	52.3	41.1	34.5	4	25.4	7/8.	101.6	4
1-1/4.	158.8	28.4	63.5	63.5	41.1	43.2	4	25.4	7/8.	111.3	4
1-1/2.	177.8	31.8	73.2	69.9	44.5	49.5	4	28.4	1	124	5
2	215.9	38.1	91.9	104.6	57.2	62	8	25.4	7/8.	165.1	11
2-1/2.	244.3	41.1	104.6	124	63.5	74.7	8	28.4	1	190.5	16
3	241.3	38.1	127	127	53.8	90.7	8	25.4	7/8.	190.5	12
4	292.1	44.5	157.2	158.8	69.9	116.1	8	31.8	1-1/8.	235	24
5	349.3	50.8	185.7	190.5	79.2	143.8	8	35.1	1-1/4.	279.4	38
6	381	55.6	215.9	235	85.9	170.7	31.8	12	1-1/8.	317.5	50
8	469.9	63.5	269.7	298.5	101.6	221.5	12	38.1	1-3/8.	393.7	77
10	546.1	69.9	323.9	368.3	108	276.4	16	38.1	1-3/8.	469.9	111
12	609.6	79.2	381	419.1	117.3	327.2	20	38.1	1-3/8.	533.4	147
14	641.4	85.9	412.8	450.9	130	359.2	20	41.1	1-1/2.	558.8	181
16	704.9	88.9	469.9	508	133.4	410.5	20	44.5	1-5/8.	41.3	616
18	787.4	101.6	533.4	565.2	152.4	461.8	20	50.8	1-7/8.	685.8	272
20	857.3	108	584.2	622.3	158.8	513.1	20	53.8	2	749.3	331
24	1041.4	139.7	692.2	749.3	203.2	616	20	66.5	2-1/2.	901.7	635

 

Dimensions of Class 1500 Slip-On Flanges
Nominal	Outside	Thick of	Diameter of	Diameter of	Length	Dia of	No of	Dia of	Dia of	Diam of	Approx
Pipe Size	diameter of	flange	Hub at base	raised face	thru Hub	bore	holes	holes	bolts	bolt circle	weight
	flange	(B)	(A)	(G)	(H)	(ID)		(L)		(K)	kg
	(D)
1/2.	120.7	22.4	35.1	38.1	31.8	22.4	4	22.4	3/4.	82.6	2
3/4.	130	25.4	42.9	44.5	35.1	27.7	4	22.4	3/4.	88.9	2
1	149.4	28.4	50.8	52.3	41.1	34.5	4	25.4	7/8.	101.6	4
1-1/4.	158.8	28.4	63.5	63.5	41.1	43.2	4	25.4	7/8.	111.3	4
1-1/2.	177.8	31.8	73.2	69.9	44.5	49.5	4	28.4	1	124	5
2	215.9	38.1	91.9	104.6	57.2	62	8	25.4	7/8.	165.1	11
2-1/2.	244.3	41.1	104.6	124	63.5	74.7	8	28.4	1	190.5	16
3	266.7	47.8	127	133.4	73.2	–	8	31.8	1-1/8.	203.2	22
4	311.2	53.8	157.2	162.1	90.4	–	8	35.1	1-1/4.	241.3	33
5	374.7	73.2	185.7	196.9	104.6	–	8	41.1	1-1/2.	292.1	59
6	393.7	82.6	215.9	228.6	119.1	–	12	38.1	1-3/8.	317.5	75
8	482.6	91.9	269.7	292.1	142.7	–	12	44.5	1-5/8.	393.7	118
10	584.2	108	323.9	368.3	158.8	–	12	50.8	1-7/8.	482.6	197
12	673.1	124	381	450.9	180.8	–	16	53.8	2	571.5	263
14	749.3	133.4	412.8	495.3	–	–	16	60.5	2-1/4.	635	–
16	825.5	146.1	469.9	552.5	–	–	16	66.5	2-1/2.	704.9	–
18	914.4	162.1	533.4	596.9	–	–	16	73.2	2-3/4.	774.7	–
20	984.3	177.8	584.2	641.4	–	–	16	79.2	3	831.9	–
24	1168.4	203.2	692.2	762	–	–	16	91.9	3-1/2.	990.6	–

 

States And Cities We Have Supplied Our Products To

• Slip-on Flanges Supplier in Andhra Pradesh
• Slip-on Flanges Supplier in Vijaywada
• Slip-on Flanges Supplier in Rajahmundry
• Slip-on Flanges Supplier in Visakhapatnam
• Slip-on Flanges Supplier in Bhilai
• Slip-on Flanges Supplier in Raigarh
• Slip-on Flanges Supplier in Korba
• Slip-on Flanges Supplier in Sirpur
• Slip-on Flanges Supplier in Gujarat
• Slip-on Flanges Supplier in Bharuch
• Slip-on Flanges Supplier in Ankleshwar
• Slip-on Flanges Supplier in Haryana
• Slip-on Flanges Supplier in Hisar
• Slip-on Flanges Supplier in Jharkhand
• Slip-on Flanges Supplier in Bokaro Steel City
• Slip-on Flanges Supplier in Jamshedpur
• Slip-on Flanges Supplier in Karnataka
• Slip-on Flanges Supplier in Bhadravati
• Slip-on Flanges Supplier in Ballari
• Slip-on Flanges Supplier in Bangalore
• Slip-on Flanges Supplier in Rourkela

• Slip-on Flanges Supplier in Hubli
• Slip-on Flanges Supplier in Kerala
• Slip-on Flanges Supplier in Kochi
• Slip-on Flanges Supplier in Calicut
• Slip-on Flanges Supplier in Thrissur
• Slip-on Flanges Supplier in Cherthala
• Slip-on Flanges Supplier in Aluva
• Slip-on Flanges Supplier in Madhya Pradesh
• Slip-on Flanges Supplier in Dewas
• Slip-on Flanges Supplier in Maharashtra
• Slip-on Flanges Supplier in Mumbai
• Slip-on Flanges Supplier in Chandrapur
• Slip-on Flanges Supplier in Kolhapur
• Slip-on Flanges Supplier in Nashik
• Slip-on Flanges Supplier in Solapur
• Slip-on Flanges Supplier in Osmanabad
• Slip-on Flanges Supplier in Pimpri – Chinchwad
• Slip-on Flanges Supplier in Aurangabad
• Slip-on Flanges Supplier in Ambernath
• Slip-on Flanges Supplier in Odisha

• Slip-on Flanges in Punjab
• Slip-on Flanges Supplier in Ludhiana
• Slip-on Flanges Supplier in Tamil Nadu
• Slip-on Flanges Supplier in Salem
• Slip-on Flanges Supplier in Coimbatore
• Slip-on Flanges Supplier in Chennai
• Slip-on Flanges Supplier in Telangana
• Slip-on Flanges Supplier in Hyderabad
• Slip-on Flanges Supplier in Uttar Pradesh
• Slip-on Flanges Supplier in Muzaffarnagar
• Slip-on Flanges Supplier in Kanpur
• Slip-on Flanges Supplier in Raebareli
• Slip-on Flanges Supplier in Unnao
• Slip-on Flanges Supplier in Uttarakhand
• Slip-on Flanges Supplier in Rudrapur
• Slip-on Flanges Supplier in West Bengal
• Slip-on Flanges Supplier in Durgapur
• Slip-on Flanges Supplier in Asansol
• Slip-on Flanges Supplier in Titagarh
• Slip-on Flanges Supplier in Kharagpur
• Slip-on Flanges Supplier in Baharampur